The impurity atoms which are mixed with pure | vedclass

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(B) To create a $P$-type semiconductor,a pure semiconductor like silicon (which is tetravalent) must be doped with trivalent impurity atoms.These triv

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Boron

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(B) To create a $P$-type semiconductor,a pure semiconductor like silicon (which is tetravalent) must be doped with trivalent impurity atoms.These trivalent atoms have $3$ valence electrons.When they replace a silicon atom in the crystal lattice,they create a vacancy or 'hole' because they can only form $3$ covalent bonds with the surrounding silicon atoms.Among the given options,Boron $(B)$ is a trivalent element (Group $13$ element),while Phosphorus $(P)$ and Antimony $(Sb)$ are pentavalent (Group $15$ elements) and Copper $(Cu)$ is a transition metal.Therefore,Boron is the correct impurity used to make a $P$-type semiconductor.

The impurity atoms which are mixed with pure silicon to make a $P$-type semiconductor are those of:

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